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Write data to internal data eeprom of stm32L152 will crash

Question asked by liao.chengyi on Sep 6, 2015
Latest reply on Sep 18, 2015 by liao.chengyi
Hi, ST sirs,

            I am using the internal data eeprom of stm32L152.
            I have the problem that write data eeprom will "crash", 
            I found that when the value of data = 0x00, the system will crash.
            Write other value is OK.
            Is that need spacial process when data value = 0x00.

            By the way, why the data eeprom need erase process?
            When will the data eeprom need be erase?
            I only do the read and write procedure.  
            Thank you.